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x86: do not zap_low_mappings in __smp_prepare_cpus 

It was okay when cpus were cold booted before this point.
But with the new state machine, they will not have arrived to
the trampoline yet. zapping low mappings will have the bad effect
of breaking it completely after paging enablement

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Glauber de Oliveira Costa 2008-03-19 14:25:42 -03:00 committed by Ingo Molnar
parent 802b8133b4
commit d2bcbad5f3
1 changed files with 0 additions and 7 deletions
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7
arch/x86/kernel/smpboot_32.c
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@ -195,11 +195,6 @@ static void __cpuinit start_secondary(void *unused)
enable_NMI_through_LVT0();
enable_8259A_irq(0);
}
/*
* low-memory mappings have been cleared, flush them from
* the local TLBs too.
*/
local_flush_tlb();
/* This must be done before setting cpu_online_map */
set_cpu_sibling_map(raw_smp_processor_id());
@ -714,8 +709,6 @@ static void __cpuinit __smp_prepare_cpu(int cpu)
schedule_work(&info.task);
wait_for_completion(&done);
}
zap_low_mappings();
}
#endif